Merge branch 'update-jquery-rails' into 'master'

Upgrade jQuery Rails from 4.0.5 to 4.1.1

Upgrades jQuery to 1.12.1 and jquery-ujs to 1.2.1.

Changelogs:
- https://github.com/rails/jquery-rails/blob/master/CHANGELOG.md
- https://blog.jquery.com/2016/01/08/jquery-2-2-and-1-12-released/
- https://github.com/rails/jquery-ujs/releases

See merge request !3642

Gemfile

@@ -217,7 +217,7 @@ gem 'font-awesome-rails', '~> 4.2'
 gem 'gitlab_emoji',       '~> 0.3.0'
 gem 'gon',                '~> 6.0.1'
 gem 'jquery-atwho-rails', '~> 1.3.2'
-gem 'jquery-rails',       '~> 4.0.0'
+gem 'jquery-rails',       '~> 4.1.0'
 gem 'jquery-scrollto-rails', '~> 1.4.3'
 gem 'jquery-ui-rails',    '~> 5.0.0'
 gem 'raphael-rails',      '~> 2.1.2'

Gemfile.lock

@@ -431,8 +431,8 @@ GEM
       json
     ipaddress (0.8.2)
     jquery-atwho-rails (1.3.2)
-    jquery-rails (4.0.5)
-      rails-dom-testing (~> 1.0)
+    jquery-rails (4.1.1)
+      rails-dom-testing (>= 1, < 3)
       railties (>= 4.2.0)
       thor (>= 0.14, < 2.0)
     jquery-scrollto-rails (1.4.3)
@@ -952,7 +952,7 @@ DEPENDENCIES
   httparty (~> 0.13.3)
   influxdb (~> 0.2)
   jquery-atwho-rails (~> 1.3.2)
-  jquery-rails (~> 4.0.0)
+  jquery-rails (~> 4.1.0)
   jquery-scrollto-rails (~> 1.4.3)
   jquery-turbolinks (~> 2.1.0)
   jquery-ui-rails (~> 5.0.0)